March 1, 2007
10:00 AM (EST)

News Release Number: STScI-2007-11

Hubble Monitors Jupiter in Support of the New Horizons Flyby

March 1, 2007: NASA's Hubble Space Telescope has recently taken images of Jupiter in support of the
New Horizons Mission. The images were taken with Hubble's Wide Field Planetary Camera 2
and the Advanced Camera for Surveys.READ: Junior version of this articleLearn about this story in the Star Witness, a science newspaper available on our sister site, Amazing Space. Hubble will continue to photograph Jupiter, as well as
its volcanically active moon, Io, over the next month as the New Horizons spacecraft flies
past Jupiter. New Horizons is en route to Pluto, and made its
closest approach to Jupiter
on February 28, 2007. Through combined remote imaging by Hubble and in situ measurements
by New Horizons, the two missions will enhance each other scientifically, allowing scientists to
learn more about the Jovian atmosphere, the aurorae, and the charged-particle environment of
Jupiter and its interaction with the solar wind.

For this photo, the combined ultraviolet- and visible-light images of Jupiter were taken with
Hubble from February 17-21. The image segments in the boxes, obtained using the Advanced
Camera for Surveys's ultraviolet camera, show auroral emissions that are always present in
Jupiter's polar regions. The equatorial regions of Jupiter were imaged in blue light by the Wide
Field Planetary Camera 2. Cloud features in Jupiter's main atmosphere are revealed. In the
ultraviolet views, the atmosphere looks more hazy because sunlight is reflected from higher in
the atmosphere.